/Engine/Plugins/Runtime/Metasound/Source/MetasoundGraphCore/Public/MetasoundVariableNodes.h
FGetVariable node provides delay free, cpu free access to a set variable.
template<typename [DataType](API\Plugins\OptimusCore\DataType)> class TVariableAccessorNode : public [Metasound::FNodeFacade](API\Plugins\MetasoundGraphCore\FNodeFacade)